Gisele Bundchen thinks Tom Brady's son is hers. Don't tell Bridget Moynahan

When Gisele Bundchen met Tom Brady, it was love -- or something like it -- at first sight.

"I knew right way -- the first time I saw him," she tells Vanity Fair recalling that she thought "That is the most beautiful, charismatic smile I've ever seen" when she first met him. They sat and talked for three hours.

"You know that feeling of, like, you can't get enough? From the first day we met, we've never spent one day without speaking to each other."

Sounds like love at first sight. "Love is something that grows, that comes from nourishment; it builds." she clarifies. "But there is a great feeling that happens, that is telling you, I don't want to leave this room! Whatever that's called, that's what happened."

Then things got complicated. Brady had recently broken up with his three-year girlfriend, actress Bridget Moynahan. Soon after he started dating Gisele, Bridget revealed she was having his baby. On her own.

"It was definitely a surprise for both of us," Gisele admits.  "In the beginning you're living this romantic fantasy; you're thinking, This can't be true, it's so good! And then, Whoops--wake-up call!"

Now Gisele says the challenge strengthened her commitment to her now husband. "I think it was a blessing, because otherwise I don't think I would have known what he was made of, and he wouldn't have known what I was made of.... It made me feel more in love with him; it made me realize who he was. Our relationship has become so much stronger, and I think I wouldn't be as certain as I am today if it weren't for that."

Still, she's never met Bridget. Although she considers Bridget's son to be, well, her son.

"I understand that he has a mom, and I respect that, but to me it's not like because somebody else delivered him, that's not my child. I feel it is, 100 percent," Gisele says. "I want him to have a great relationship with his mom, because that's important, but I love him the same way as if he were mine. I already feel like he's my son, from the first day."

What a lucky little boy! And lucky big boy too.

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Is Gisele's Vogue cover racist?

Gisele looks great leaving a room!

Photo: In this May 5, 2008 file photo, Tom Brady and Gisele Bundchen arrive at the Metropolitan Museum of Art's Costume Institute Gala in New York. (AP Photo/Peter Kramer, file)